diff --git a/src/main/java/de/ailis/usb4java/libusb/Usb20ExtensionDescriptor.java b/src/main/java/de/ailis/usb4java/libusb/Usb20ExtensionDescriptor.java
index 07e3aca..633fc6e 100644
--- a/src/main/java/de/ailis/usb4java/libusb/Usb20ExtensionDescriptor.java
+++ b/src/main/java/de/ailis/usb4java/libusb/Usb20ExtensionDescriptor.java
@@ -97,7 +97,7 @@ public final class Usb20ExtensionDescriptor
             bLength() & 0xff,
             bDescriptorType() & 0xff,
             bDevCapabilityType() & 0xff,
-            String.format("0x%08x", bmAttributes() & 0xffffffff));
+            String.format("0x%08x", bmAttributes()));
     }
 
     @Override